Jump to main content
Jump to site search

Issue 28, 2015
Previous Article Next Article

Different dimensional silica materials prepared using shaped block copolymer nanoobjects as catalytic templates

Author affiliations

Abstract

A general approach to fabricate a series of silica nanoobjects with sheet-like, tubular and hollow spherical shapes was reported. These silica nanoobjects were prepared by using water-dispersed diblock copolymer nanoobjects with glassy polystyrene cores and densely grafted poly(2-(dimethylamino)ethylmethacrylate) (PDMAEMA) shells as templates as well as catalysts. A sol–gel reaction of tetramethoxysilane (TMOS) was subsequently induced by PDMAEMA shells of shaped nanoobjects in water dispersions at near-neutral pH and under ambient conditions, and thus the shaped polymer@silica hybrids with a high silica content (around 70 wt% silica in hybrids) were obtained. Then silica nanoobjects of three different dimensions were further prepared by calcination at 650 °C to remove the organic components. The spherical and cylindrical silicas have a hollow structure. Formation of diblock copolymers, polymer nanoobjects, polymer@silica hybrids, and silica nanoobjects was characterized by 1H NMR spectroscopy, size exclusion chromatography (SEC), small-angle X-ray scattering (SAXS), transmission electron microscopy (TEM), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), solid state 29Si CPMAS NMR analysis, N2 adsorption–desorption measurements, and Fourier-transform infrared spectroscopy (FT-IR). This methodology could be a general approach to fabricate various inorganic nanoparticles with different geometric shapes.

Graphical abstract: Different dimensional silica materials prepared using shaped block copolymer nanoobjects as catalytic templates

Back to tab navigation

Supplementary files

Article information


Submitted
01 Apr 2015
Accepted
02 Jun 2015
First published
04 Jun 2015

J. Mater. Chem. B, 2015,3, 5786-5794
Article type
Paper

Different dimensional silica materials prepared using shaped block copolymer nanoobjects as catalytic templates

D. Yao, Y. Chen and R. Jin, J. Mater. Chem. B, 2015, 3, 5786
DOI: 10.1039/C5TB00589B

Social activity

Search articles by author

Spotlight

Advertisements